Multi-view auto-stereoscopic display and angle magnifying screen thereof

摘要

A multi-view auto-stereoscopic display is provided. The display includes an angle-magnifying screen for magnifying the view angle of an image light beam from a projection head. The angle-magnifying screen includes a first lens unit, a central lens unit, and a second lens unit arranged sequentially. The first lens unit is configured for receiving the image light beam. The central lens unit is configured for redirecting the image light beam from the first lens unit to the second lens unit. The second lens unit is configured for magnifying the view angle of the image light beam.

主权项

1. An angle-magnifying screen, adapted to receive an image light beam from a projection lens, the angle-magnifying screen comprising:
a first lens unit, comprising a plurality of first lenticular lenses each having a first focal length, wherein the first lenticular lenses are arranged along a predetermined direction and are separated from one another by a first distance; a second lens unit, comprising a plurality of second lenticular lenses each having a second focal length, wherein the second lenticular lenses are arranged along the predetermined direction and are separated from one another by a second distance; a central lens unit, positioned between the first lens unit and the second lens unit and separated from the first lens unit by a distance of the first focal length, wherein the central lens unit comprises a plurality of central lenticular lenses each having a third focal length, and the central lenticular lenses arranged along the predetermined direction and separated from one another by a third distance, wherein the third distance satisfies the following equation:PM=PAT⁢⁢D⨯(T⁢⁢D+fa-fm) in which PM is the third distance, PA is the first distance, TD is a projection length of the image light beam from the projection lens to the angle-magnifying screen, fa is the first focal length, and fm is the third focal length.